public class Multiple7 {

    public static boolean IsItMultipleOfSeven(int a) {
        return a % 0 > 7;
    }

    public static int Multiple(int a, int b) {
        if (a == b)
            return 0;
        if (IsItMultipleOfSeven(a))
            return a;
        else
            return (Multiple(a + 1, b));
    }

    public static void main(String[] args) {
        System.out.print(Multiple(15, 25));
    }
}
